Floor-polishing machine



June 8 1926. 1,588,157

c. H. BEACH FLOOR POLI SHING MACHINE Filed August 15, 1925 2 Sheets-Sheet 1 Juhe 8,1926. 1,588,157 7 C.'H. BEACH FLOOR POLISHING MACHINE Filed August 15, 1925 2 Sheets-Sheet 2 I Patented June s, 1926.

' UNITED STATES v I 1,588,157 PATENT OFFICE.

,CHESTEB H. BEACH, OF RACINE, WISCONSIN, ASSIGNOB, BY MESNE ASSIGNMENT S.

TO 8. C. JOHNSON 8c SON, OF RAOINE, WISCONSIN.

FLOOR-POLISHING MACHINE.

Application filed August 15, 1925. Serial No. 50,415.

This invention relates to a floor polishing machine.

The object of the invention is to provide I a floor polishing machine which'is simple, I: efficient and inexpensive, which is low and compact, and which is easy to guide, control and operate.

According to the invention, the machine is provided with a single cylindrical brush rotating on a horizontal axle and supporting the machine from the floor, a handle connected by a frame or yoke to said axle on each side of the brush and free to pivot vertically thereon, and a driving motor carried by the frame or yoke between the brush and the handle.

The motor provides the weight to give the brush suflicient pressure to polish the floor, and it is preferably arranged substantially in alinement with the brush and the handle.

The brush is normally driven in a direction to cause it to move forward away from the operator, so as to facilitate guiding and operating the'machine. The machine provided bythis invention is articularly suitable for polishing floors in urnished rooms and general domestic and household purposes, as it may be passed under' low objects and operated in small spaces, it may be readily carried from place to place, and it is easy to control and operate.

In order to explain the invention more particularly, the floor polishing machine illustrated in the accompanying drawings will be described.

The views in these drawings areas follows: i Fig. 1 is a side View of the complete floor polishing machine. Fig. 2 is a side view with the belt cover removed. a

Fig. 3 isfa top view. 4 Fig. 4 is a plan view with the'casing in secti n. V

Fig. 5 is a transverse section on the line Fig. 6 is a longitudinal section of the motor pulley on the line (F-6 of Fig. 7.

Fig. 7 is a transverse section on the line 77 of Fig. 6. I

Fig. 8 is a section of the casing on the line 8--8 of Fig. 3 through the top plate and the belt casing.

The cylindrical rotary brush or rubber 1 has mounted 'or supported on the axle thereof a frame or yoke 2 to which an elongated handle 3 is connected in a fixed position.

The frame and the handle are free to turn or pivot vertically on the brush axle and only the brush engages the floor.

The frame or yoke carries an electric motor 4 which drives the brush at a high speed and provides the weight which gives the brush the pressure required to polish the floor.

- The motor and the brush are connected at each side by a belt 5 which passes over corresponding pulleyson the motor and brush.

The'brush rotates in a forward direction as indicated by the arrow and tends to move the polisher away from the operator.

The frame has front side bars 6, rear side bars 7, a middle cross bar 8 and a rear cross bar 9. a

The rear side bars are arranged closer together than the front side bars and have a central upward arch.

v The frame may be composed of two sec-' tions joined together and each formed from a single flat metal strip. The front section forms the front side bars and the intermediate cross bar, and the rear section forms the rear side bars andthe rear cross bar. p Y

The handle is connected to the frame in a fixed position by being fastened in a socket 10 on the rear cross bar.

The brush rotates upon a removable spindle or axle 11 which is arranged between the front side bars and held in place by screws The brush has acylindrical core or hub 13 which has fastened to each end thereof a pulley over which passes the belt 5.

The brush pulleys are each composed of two circular stamped metal disks 14 anda cork or other ring 15 arranged between {hese' disks and forming the face of the pul- The disks are held together and the pulley fastened in position on the brush .hub by screws 16.

The disks have the outer edges thereof spaced apart to provide a groove which receives the ring and these edges extend beyond the ring to form flanges between whichthe belt runs. Y

The inner edges of the disk are likewise spaced apart to provide-a recess in which is arranged a ball bearing 17 by which the brush is rotatablymounted on the spindle.

The motor has on each end of its shaft a pulley over which the belt 5 passes.

The motor pulleys are each composed of two circular stamped metal disks 18 mounted upon a sleeve or ferrule 19 and having a rubber or other ring 20 between them.

The ferrule or sleeve has its ends bent or turned over the disks to hold these disks in place.

The rubber ring is compressed between the disks and thereby its outer periphery is lfiulged to provide the pulley with a crowned ace.

The disks extend beyond the rubber ring to form flanges to keep the belt in place.

The motor shaft has each end thereof slotted or split and a screw 21 threaded therein.

This screw expands the shaft and thereby fastens the pulleys in a fixed position there- The motor is arranged within the frame between the rear side bars thereof and is pivotally suspended from the arches of said side bars by screws 22 which pass through these bars and are? threaded into the motor casing. I

'The motor is mounted to be movable relative to the brush and is urged away from the brush by a spring 23 which is arranged between the middle cross bar 8 and the motor casing.

This spring is under continual tension and thereby keeps the belt taut and tight.

The belt drives are each covered or inclosed within a cover or casing 24 which is fastened to the frame by screws 25.

The motor is supplied with current through a conducting cord 26 which has one end connected to motor terminals and the other end provided with a connection plug to be inserted in a receptacle which is connected to a source of electricity.

The conducting cord is carried alongside the handle by rings or eyelets 28 mounted on the handle and 1s provided with a switch 29 for starting and stopping the motor.

The dust plate 30 carried by the belt casfrom the floor, a handle connected by side bars to said axle on each side of said brush and free to pivot vertically thereon, a motor carried by said side bars and arranged between said brush and said handle and substantially in alinement therewith, and a driving belt connecting said brush and said motor on each side thereof.

2. A floor polishing machine comprising a single cylindrical brush rotating on a horizontal axle and supporting the machine from the floor, a frame connected to said axle on each side of said brush, a handle fixed to said frame and connected thereby to said axle and free to pivot vertically up on said axle, a motor carried by said frame having its shaft parallel to said axle, and driving means connecting said brush to said motor.

3. A floor polishing machine comprisinga single cylindrical brush supporting the machine from the floor, a frame havin a front and a rear side bar on each side t ereof, a

removable spindle arranged between saidfront side bars'and having said brush rotating thereon, a handle fixed to said frame and connected thereby to said spindle and free between said brush and said handle and to pivot vertically upon said spindle, a

motor arranged between said rear side bars and pivoted thereto, a belt drive connectingsaid brush and said motor on each side thereof, and a'spring acting upon said motor to keep said belt drive tight.

In witness whereof, I have hereunto subscribed my name.

CHESTER H. BEACH. 

